Product details


Output options Fixed Output, Programmable Output Iout (Max) (A) 0.15 Vin (Max) (V) 5.5 Vin (Min) (V) 2.2 Vout (Max) (V) 5.25 Vout (Min) (V) 1.2 Fixed output options (V) 2, 2.2, 2.5, 3.3 Noise (uVrms) 86 Iq (Typ) (mA) 0.0005 Thermal resistance θJA (°C/W) 65 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Enable Accuracy (%) 3 PSRR @ 100 KHz (dB) 13 Dropout voltage (Vdo) (Typ) (mV) 200 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-23-THN (DDC) 5 8 mm² 2.9 x 2.8 WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Linear regulators (LDO)


  • Low IQ: 1µA
  • 150mA, Low-Dropout Regulator with Pin-Selectable Dual Voltage Level Output
  • Low Dropout: 200mV at 150mA
  • 3% Accuracy Over Load/Line/Temperature
  • Available in Dual-Level, Fixed Output Voltages from 1.5V to 4.2V Using Innovative Factory EPROM Programming
  • Available in an Adjustable Version from 1.22V to 5.25V or a Dual-Level Output Version
  • VSET Pin Toggles Output Voltage Between Two Factory-Programmed Voltage Levels
  • Stable with a 1.0µF Ceramic Capacitor
  • Thermal Shutdown and Overcurrent Protection
  • CMOS Logic Level-Compatible Enable Pin
  • Available in DDC (TSOT23-5) or DRV (2mm × 2mm SON-6) Package Options
    • TI MSP430 Attach Applications
    • Power Rails with Programming Mode
    • Dual Voltage Levels for Power-Saving Mode
    • Wireless Handsets, Smartphones, PDAs, MP3 Players, and Other Battery-Operated Handheld Products

All other trademarks are the property of their respective owners

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The TPS781 family of low-dropout (LDO) regulators offer the benefits of ultralow power (IQ = 1µA), miniaturized packaging (2×2 SON-6), and selectable dual-level output voltage levels. An adjustable version is also available, but does not have the capability to shift voltage levels.

The VSET pin allows the end user to switch between two voltage levels on-the-fly through a microprocessor-compatible input. This LDO is designed specifically for battery-powered applications where dual-level voltages are needed. With ultralow IQ (1µA), microprocessors, memory cards, and smoke detectors are ideal applications for this device.

The ultralow-power and selectable dual-level output voltages allow designers to customize power consumption for specific applications. Designers can now shift to a lower voltage level in a battery-powered design when the microprocessor is in sleep mode, further reducing overall system power consumption. The two voltage levels are preset at the factory through a unique architecture using an EPROM. The EPROM technique allows for numerous output voltage options between VSET low (1.5V to 4.2V) and VSET high (2.0V to 3.0V) in the fixed output version only. See the table in this data sheet or consult with your local factory representative for exact voltage options and ordering information; minimum order quantities may apply.

The TPS781 series are designed to be compatible with the TI MSP430 and other similar products. The enable pin is compatible with standard CMOS logic. This LDO is stable with any output capacitor greater than 1.0µF. Therefore, implementations of this device require minimal board space because of miniaturized packaging and a potentially small output capacitor. The TPS781 series IQ (1µA) also come with thermal shutdown and current limit to protect the device during fault conditions. All packages have an operating temperature range of TJ = -40°C to +125°C. For high-performance applications requiring a dual-level voltage option, consider the TPS780 series, with an IQ of 500nA and dynamic voltage scaling.

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Technical documentation

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Type Title Date
* Datasheet 150mA, LDO Reg, Ultralow-Power, Iq 1uA w/ Pin-Selectable, Dual-Level Output Volt datasheet (Rev. B) May 11, 2008
Application note LDO Noise Demystified (Rev. B) Aug. 18, 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Application note LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
User guide Universal Low-Dropout (LDO) Linear Voltage Regulator EVM User's Guide Oct. 12, 2016
User guide TPS78101 EVM Apr. 28, 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SBVM102A.ZIP (22 KB) - PSpice Model
SBVM390.ZIP (21 KB) - PSpice Model
SBVM391.ZIP (22 KB) - PSpice Model

Reference designs

AM437x Low Power Suspend Mode with LPDDR2
TIDEP0024 This low power mode implementation realizes processor power consumption less than 0.1 mW while keeping LPDDR2 memory in self refresh consuming ~ 1.6 mW. The system solution is comprised of AM437x Sitara processor, LPDDR2 memory and TPS65218 power management IC and optimized for new low power mode (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 5 View options
WSON (DRV) 6 View options

Ordering & quality

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